Pulley-bushing



(No Mode1.)

,;J.,J 111111101131l 1 v 1 PULLRY131111111111@H i 1- No. 381,151. Patented Apr.' 17,'18881.; n.

' Fa@ y 4o ing alone.

[UNITED STATES".

'PATENT JOHN JosnPH MAHONEY, OFHOLDHN, MassacHUsmits."`

'PueLEY-BUSHING.

SPECIFICATION forming parser Letterspatent Nasal, 151, dated April 17,1888.

.applicationnxeq-necemberio,1387. serituNo, 251504. N0moae1. i"

To all whom it 'w'wtyvconcern:

l Be it know n that I, JOHN JOSEPH MAHONEY,

aeitizen of the United States, residing at Holv den, in the bounty'of Worcester and Common.- wealth of Massachusetts, have invented a new and useful Improvement in PulleyBushings, of which the following is a specification. v The object of my `invention is to provide a peculiarly-constructed bsh'ingfor the hub of pulleysand similar structures, bythe use of which a-pulley maybe secured upon a shaft of any diameter withoutother yoperation of adapting the pulley to the shaft than inserting a bushing of proper dimensions. I5

' larger than the Vlargest shaft upon which it is to be placed, and the practice of inserting a v bushing in such hubs to reduce the size of the bore to t a given shaft is'elementary and pre remove a plain driven bushing is a matter of so much practical difficulty thatit is frequently cheaper to get anew pulley when a change is to be made,-with my improved bushing it becomes a simple matter 4to change a pulley from one diameter of shaft to another, and this with- -out practical bstacles or'objections. It is de` sirable in practice to sometimes make up a lot.

' of pulleys to be put uponfshafts of unknown diameters, and again in certain situations itis desirable to apply the sanne pulley to different shafts. To meet these requirements in a simple and practical way is the object of my invention. f

The construction and application of the bushing are' illustrated by the.' drawings, Figures 1 and 3 being side elevations of a pulley with bushings in place; Fig. 2, a cross-section ofFig.v 1, and Figs. 4, 5, and 6 detail views of the bush- A represents an ordinary pulley having a -f hub large enough to receive the bushing of sufficient diameter to fit the largest shaft the pulley is to be put upon. The hub is bored out and splined upon opposite sides, forming two keyways or channels on the inside of the hub. The bushing is made inhalves, or what is tech'- nically known as a split bushing, each half being rprovided-with a tongue, C., so formed 5o 'that when the halves are put together in proper relation they form-a single tongue 4of such dimensions as to iit the vkeyway planed on the The hub of the 4pulley must lbey bored o ut sents no novelty; but, whereas to insert andA inside of the hub, as-before described, and as" VVclearlyfshown in Figs. l and 3. Thebushing y; f- -is further provided upon one side with a flange,

F, the line of parting of which does not coincidewith the planek of parting 'of the halves,

Yas is indicated byF in thefse'veral guresif The'effect of this isthat theftlangeF'upon one half of the bushing forms a rabbet, F2, Fig.

kbe insertedin the hub of,a, pulley, as described, 6 5' it is only necessary to" confine the one half of thebushing yhaving the tongue F2 against i ,slidinglcngitudinall y out of the huby to conv fine the Wholebushing fixedly and firmly within thc hub-a condition essential'to practicalisuc- 7`o cess in use; This I attain by'a set-screw, S, which'is threaded in the h-ub and has an unthreaded portion lentering a correspondingIIA hole drilled in the bushing, thus preventing any endy movement of ythe'latter.- The set-75 screw may not only enter the bushing and serve tol secure it within the hnb, as aforedescribed,v

' but may project through 'the bushing) and in-` way, Vas'shown, and theppulley secured tothe y l shaft by a key therein, either in combination 85 with the set screw or screws, or without, in the usual manner, provided always there shall be the set-screw S, or an'jequivalent, acting; to'

prevent the bushingl from moving longitudiy nally in the hub. y 9o It is clearly evident that the bushing described may bewithdrawn fromthe hub ofthe pulley by turning out sufcientlythe setlsc'rew and another inserted andV made secure lin its place by the simplest and easiest of mechany ical operations#r When the bushing and setscrew arein place, the former is as rigidly se# curedA to the pulley as though Iit were a v.partv of thehub itself, the' tongue G fitting the keyways, the flange F, the rabbet F2 and tongue roo' v f, F3, and the vset-'screw Svser'ving togethery to produce this result. u l Y If aset of bushings be provided for each sizeof shaft,the pulley thus iittedfmaybe rap-A idly, easily, and economically changed from one sized shaft to another, as desired; also, a lot of pulleys may be made up without regard to size of bore, to be afterward furnished with such bushing as may be required.

In Fig. 1 is shown a bushing with the largestsized bore that the pulley will admit, and in Fig. 3 one 'with the smallest bore likely to be used. In Fig. 4 the latter bushing is shown with the halves drawn somewhat apart. `A side elevation is given in Fig. 5, and an end view in Fig. 6.

f The bushing, being in halves, admits of taking out and putting in others without taking the pulley off the shaft or the shaft out of its bearings. It is equally applicable to clampshaft.

for loose pulleys and other bearings requiring renewal from any cause.

In accordance with the foregoing declared and described invention, I claim- Y 1. rlhe bushing composed of separableparts and having each thereof provided with a tongue, C, a flange, F, a rabbet, F2, and a tongue, F3. y

2. The bushing composed of separable parts and having each thereof provided with a tongue, C, a flange, F, a rabbet, F2, and a tongue, F3, in combination with a hub or sleeve constructed to receive said bushing and a setscrew, as and for the purposes set forth.

JOHN JOSEPH MAHONEY.

Witnesses:

ROBERT A. KNIGHT, HENRY W. KING. 

